<template>
  <div class="chatbot-container">
    <a href="https://blog.csdn.net/weixin_48168510/article/details/145677186">https://blog.csdn.net/weixin_48168510/article/details/145677186</a>
    <div
        class="avatar"
        @click="toggleChat"
        :style="{
        transform: isChatOpen
          ? 'scale(0.9) rotate(-8deg)'
          : 'scale(1) rotate(0)',
      }"
    ></div>
    <div
        class="chat-dialog"
        :class="{ active: isChatOpen }"
        v-click-outside="closeChat"
    >
      <div class="dialog-header">
        <h3>在线客服</h3>
        <div class="close-btn" @click="toggleChat">×</div>
      </div>
      <div class="dialog-body">
        <div class="message-container" ref="scrollbarRef">
          <div v-for="(message, index) in messagesWithTimestamps" :key="index">
            <!-- 时间戳 -->
            <div class="timestamp" v-if="message.showTime">
              {{ formatSendTime(message.timestamp) }}
            </div>
            <!-- 消息列表 -->
            <div
                :class="[
                'message-bubble',
                message.type === 'user' ? 'user-message' : 'bot-message',
              ]"
            >
              {{ message.content }}
            </div>
          </div>
        </div>

        <div class="input-area">
          <input
              v-model="inputMessage"
              type="text"
              class="message-input"
              placeholder="输入消息..."
              @keypress.enter="sendMessage"
          />
          <button class="send-button" @click="sendMessage">发送</button>
        </div>
      </div>
    </div>
  </div>
</template>

<script setup>
import { nextTick, ref, computed } from "vue";

const isChatOpen = ref(false);
const inputMessage = ref("");
const messages = ref([]);

//创建新的对话数组，加上属性showTime
const messagesWithTimestamps = computed(() => {
  return messages.value.map((item, index) => ({
    ...item,
    showTime: index == 0 || shouldShowTime(index),
  }));
});
//计算两次会话时间是否超过3分钟方法
const shouldShowTime = (index) => {
  const current = new Date(messages.value[index - 1].timestamp);
  const next = new Date(messages.value[index].timestamp);
  const diff = next ? next - current : 0;
  return diff > 3 * 60 * 1000; // 如果间隔超过3分钟返回true
};
// 切换聊天窗口
const toggleChat = () => {
  isChatOpen.value = !isChatOpen.value;
  if (isChatOpen.value && messages.value.length === 0) {
    messages.value.push({
      type: "bot",
      content: "您好！我是智能客服小助手，很高兴为您服务。请问有什么可以帮您？",
      timestamp: new Date(), //时间戳
    });
  }
};
// 关闭聊天窗口
const closeChat = () => {
  isChatOpen.value = false;
};
// 发送消息
const sendMessage = () => {
  const message = inputMessage.value.trim();
  if (message) {
    messages.value.push({
      type: "user",
      content: message,
      timestamp: new Date(), //时间戳
    });
    inputMessage.value = "";
    const messageContainer = document.querySelector(".message-container");

    try {
      setTimeout(async () => {
        messages.value.push({
          type: "bot",
          content: "正在思考中...",
          timestamp: new Date(), //时间戳
        });
        nextTick(() => {
          // 滚动到底部
          messageContainer.scrollTop = messageContainer.scrollHeight;
        });
        // 发送请求
        const response = await fetch(
            "https://api.siliconflow.cn/v1/chat/completions",
            {
              method: "POST",
              headers: {
                Authorization:
                    "Bearer sk-bnlbdzgfqyqokwboisvheyohbmbhnpzpbyhsuvkpidkncpij",
                "Content-Type": "application/json",
              },
              body: JSON.stringify({
                frequency_penalty: 0,
                max_tokens: 1024,
                model: "deepseek-ai/DeepSeek-V3",
                temperature: 0,
                top_k: 49,
                top_p: 0.7,
                messages: [
                  {
                    role: "user",
                    content: message,
                  },
                ],
              }),
            }
        );
        const data = await response.json();
        // 过滤 "正在思考中..." 消息
        messages.value = messages.value.filter((item) => {
          return item.content.indexOf("正在思考中") === -1;
        });
        if (response.choices) {
          // 处理响应数据
          messages.value.push({
            type: "bot",
            content: data.choices[0].message.content,
            timestamp: new Date(), //时间戳
          });
        } else {
          // 处理错误情况
          messages.value.push({
            type: "bot",
            content: "抱歉，我现在无法回答您的问题，请稍后再试。",
            timestamp: new Date(), //时间戳
          });
        }
        nextTick(() => {
          // 滚动到底部
          messageContainer.scrollTop = messageContainer.scrollHeight;
        });
      }, 1000);
      // 滚动到底部
    } catch (error) {
      console.error("Error:", error);
    }
  }
};

const formatTime = (date) => {
  // 格式化时间为“时:分”
  const hours = date.getHours().toString().padStart(2, "0");
  const minutes = date.getMinutes().toString().padStart(2, "0");
  return hours + ":" + minutes;
};
const getWeekday = (date) => {
  // 获取星期几的中文表示
  const weekdays = [
    "星期天",
    "星期一",
    "星期二",
    "星期三",
    "星期四",
    "星期五",
    "星期六",
  ];
  return weekdays[date.getDay()];
};

const formatSendTime = (sendTime) => {
  const now = new Date();
  const sendDate = new Date(sendTime);
  // 计算时间差（以毫秒为单位）
  const timeDiff = now - sendDate;
  const startOfToday = new Date(
      now.getFullYear(),
      now.getMonth(),
      now.getDate()
  );
  const startOfTargetDate = new Date(
      sendDate.getFullYear(),
      sendDate.getMonth(),
      sendDate.getDate()
  );
  // 一天内的毫秒数
  const oneDay = 24 * 60 * 60 * 1000;
  // 如果发送时间在当前时间之前
  if (timeDiff < 0) {
    return "Invalid time"; // 或者其他错误处理
  }
  // 发生在同一天
  if (startOfToday.getTime() === startOfTargetDate.getTime()) {
    return formatTime(sendDate);
  }
  // 如果发送时间在一天内
  if (timeDiff < oneDay) {
    return "昨天 " + formatTime(sendDate);
  }
  // 如果发送时间在二天至七天内
  if (timeDiff < 7 * oneDay) {
    const weekday = getWeekday(sendDate);
    return weekday + " " + formatTime(sendDate);
  }
  // 如果发送时间超过七天
  return (
      sendDate.toLocaleDateString("zh-CN", {
        year: "numeric",
        month: "2-digit",
        day: "2-digit",
      }) +
      " " +
      formatTime(sendDate)
  );
};

</script>

<style>
/* 原有样式保持不变 */
:root {
  --primary-color: #4a90e2;
  --hover-color: #357abd;
}

body {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  background: #f0f2f5;
  margin: 0;
  font-family: "Microsoft YaHei", sans-serif;
}

.chatbot-container {
  position: fixed;
  bottom: 30px;
  right: 30px;
  z-index: 1000;
}

/* 新增头像样式 */
.avatar {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  cursor: pointer;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
  box-shadow: 0 8px 20px rgba(74, 144, 226, 0.3);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
  background-color: #357abd;
}

.avatar:hover {
  transform: scale(1.1) rotate(8deg);
  box-shadow: 0 12px 25px rgba(74, 144, 226, 0.4);
}

.avatar::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 30px;
  height: 30px;
  background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="white"><path d="M20 2H4c-1.1 0-2 .9-2 2v18l4-4h14c1.1 0 2-.9 2-2V4c0-1.1-.9-2-2-2zm-3 12H7v-2h10v2zm0-3H7v-2h10v2zm0-3H7V6h10v2z"/></svg>')
  no-repeat center;
}

/* 聊天对话框 */
.chat-dialog {
  position: absolute;
  bottom: 80px;
  right: 0;
  width: 320px;
  background: white;
  border-radius: 12px;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.1);
  transform: scale(0);
  transform-origin: bottom right;
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.chat-dialog.active {
  transform: scale(1);
}

.dialog-header {
  padding: 16px;
  background: var(--primary-color);
  border-radius: 12px 12px 0 0;
  color: white;
  display: flex;
  align-items: center;
}

.dialog-header h3 {
  margin: 0;
  font-size: 16px;
  font-weight: 500;
}

.close-btn {
  margin-left: auto;
  cursor: pointer;
  padding: 0px 4px;
  border-radius: 50%;
  background: rgba(0, 0, 0, 0.1);
}

.dialog-body {
  padding: 16px;
  height: 300px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
}

.timestamp {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  margin-bottom: 3px;
}

.message-container {
  flex: 1;
  overflow-y: auto;
  margin-bottom: 16px;
  display: flex;
  flex-direction: column;
}

.input-area {
  display: flex;
  gap: 8px;
  padding-top: 12px;
  border-top: 1px solid #eee;
}

.message-input {
  flex: 1;
  padding: 8px 12px;
  border: 1px solid #ddd;
  border-radius: 20px;
  outline: none;
  transition: border-color 0.3s;
}

.message-input:focus {
  border-color: var(--primary-color);
}

.send-button {
  padding: 8px 16px;
  background: var(--primary-color);
  color: white;
  border: none;
  border-radius: 20px;
  cursor: pointer;
  font-size: 14px;
}

.send-button:hover {
  background: var(--hover-color);
}

.message-bubble {
  padding: 8px 12px;
  margin-bottom: 8px;
  border-radius: 4px;
  animation: fadeIn 0.3s ease;
  max-width: 80%;
  display: inline-block;
  word-break: break-all;
  box-shadow: 0px 0px 12px rgba(0, 0, 0, 0.12);
  border: 1px solid #e4e7ed;
}

.user-message {
  background: var(--primary-color);
  color: #ffffff;
  float: right;
}

.bot-message {
  background: #ffffff;
  color: #303133;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* 响应式设计 */
@media (max-width: 480px) {
  .chatbot-container {
    bottom: 20px;
    right: 20px;
  }

  .chat-dialog {
    width: 90vw;
    bottom: 70px;
  }

  .avatar {
    width: 50px;
    height: 50px;
  }
}
</style>
